Features
Applications
■ Radial leaded devices
■ Fast tripping resettable PTCs
■ Customer Premise Equipment (CPE)
■ Central Office / Telecom Centers (CO)
■ Access equipment
RX012
■ Binned and sorted narrow resistance
ranges available
24001K
■ RoHS compliant*
■ Agency recognition:
MF-RX/250 Series - Telecom PTC Resettable Fuses
Electrical Characteristics
Model
One Hour
Max. Interrupt
Ratings
Hold Current
Initial Resistance
Post-Trip
Max.
Operating
Voltage
(Vdc)
Resistance
Ohms
at 23 °C
Volts
Amps
(A)
Amps
at 23 °C
Ohms
Ohms
(Vrms)
Max.
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
at 23 °C
Min.
4.0
at 23 °C
Max.
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
10.0
10.0
I
Max.
8.0
Max.
16.0
16.0
14.0
16.0
16.0
16.0
16.0
16.0
14.0
12.0
14.0
14.0
12.0
4.0
H
MF-RX012/250
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
0.12
0.12
MF-RX012/250-A
MF-RX012/250-C
MF-RX012/250-F
MF-RX012/250-1
MF-RX012/250-2
MF-RX012/250-T
MF-RX012/250U
MF-RX014/250
MF-RX014/250-A
MF-RX014/250-B
MF-RX014/250-T
MF-RX014/250U
MF-RX018/250
7.0
9.0
0.12
0.12
0.12
0.12
0.12
0.12
0.145
0.145
0.145
0.145
0.145
0.18
5.5
7.5
6.0
6.0
10.5
9.0
8.0
7.0
6.0
3.0
10.5
12.0
10.0
6.0
3.0
5.5
4.5
6.0
5.4
7.5
3.5
6.5
0.8
2.0
MF-RX018/250U
0.18
0.8
2.0
4.0
“U” suffix indicates product without insuꢂation coating.
Environmental Characteristics
Operating/Storage Temperature........................... -40 °C to +85 °C
Maximum Device Surface Temperature
in Tripped State ................................................ 125 °C
Passive Aging....................................................... +85 °C, 1000 hours.............................................. 15 ꢀ tꢁpicaꢂ resistance change
.......................................................................... +60°C, 1000 hours................................................ 15 ꢀ tꢁpicaꢂ resistance change
Humiditꢁ Aging..................................................... +85 °C, 85 ꢀ R.H. 500 hours............................... 15 ꢀ tꢁpicaꢂ resistance change
Thermaꢂ Shock ..................................................... MIL-STD-202F, Method 107G, ............................. 10 ꢀ tꢁpicaꢂ resistance change
.......................................................................... +125 °C to -55 °C,10 times .................................. 15 ꢀ tꢁpicaꢂ resistance change
Soꢂvent Resistance............................................... MIL-STD-202, Method 215B ................................ No change
Lead Soꢂerabiꢂitꢁ................................................... ANSI/J-STD-002................................................... >95 ꢀ coverage
Fꢂammabiꢂitꢁ ......................................................... IEC 695-2-2 .......................................................... No Fꢂame for 60 secs.
Vibration ............................................................... MIL-STD-883C, Method 2007.1, Condition A ...... 5 ꢀ tꢁpicaꢂ resistance change
Test Procedures And Requirements For Model MF-RX/250 Series
Test
Test Conditions
Accept/Reject Criteria
Visuaꢂ/Mech..................................................... Verifꢁ dimensions and materiaꢂs...................... Per MF phꢁsicaꢂ description
Resistance....................................................... In stiꢂꢂ air @ 23 °C............................................. Rmin ≤ R ≤ Rmax
Time to Trip...................................................... 5 times Ihoꢂd, Vmax, 23 °C.............................. T ≤ max. time to trip (seconds)
Hoꢂd Current.................................................... 30 min. at Ihoꢂd................................................ No trip
Trip Cꢁcꢂe Life.................................................. Vmax, Imax, 100 cꢁcꢂes................................... No arcing or burning
Trip Endurance ................................................ Vmax, 48 hours................................................ No arcing or burning
UL Fiꢂe Number ............................................... E 174545S
CSA Fiꢂe Number............................................. CA 110338
TÜV Fiꢂe Number ............................................. R2057213
*RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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